Cyclops : Jurnal Teknik Sipil dan Perencanaan

EFFECT OF THE 30° TIP WINDOW MODEL ON AIR MOVEMENT IN WEST AND EAST ORIENTED BUILDINGS

bernard harianja — 2024-05-29

This research is part of previous research. The aim of this research is to find the correct building orientation and consider aspects of speed and source of dominant wind direction as input, position and area of ventilation openings, air velocity and air movement patterns in interior spaces with a 30° tipping window model located at two envelope planes facing each other (cross ventilation).
The research object is a meeting room with an area of 54 m2 located in Kwadeware Village, Sentani City which will be modeled using the Ecotect Analysis 2011 CFD (Computational Fluid Dynamics) simulation program. The input data for running this simulation program uses primary data taken in the field, namely building orientation data. existing, average exterior wind speed (5 m/s) and exterior air temperature (28°C) and interior (32°C) as well as secondary data such as dominant wind direction and average exterior air temperature in one year from BMKG Jayapura Region V Center, as well as data on air viscosity (viscosity) 1.8e-05 and air pressure (1.2 kg/m3) from International Standards.
It was found that the building orientation was correct, the ventilation openings on the West side envelope were the most optimal areas to produce interior air flow movement and velocity (0.319 m/s). This is because the dominant wind direction is from the West, the ventilation openings on the West side casing are wider than the ventilation openings on the East side casing. It was felt that the interior air flow movement pattern was not optimal, this was because not all of the inlet holes were positioned directly opposite the outlet holes, only 12 of the 36 inlet ventilation holes were directly opposite the 4 outlet ventilation holes.

REDESIGN OF JAYAPURA VATENAMOYA PARK AS A MEANS OF RECREATION

irwan pahata — 2024-05-29

Vatenamoya Park is one of the parks in the center of Jayapura City so this park can be categorized as a city park. This park is close to Bank Mandiri Park and Imbi Park, however Vatenamoya Park has a smaller area than the other two parks. However, in terms of actual use, Vatenamoya Park already has several supporting facilities, for example visitor benches, fountains, slides; swings and seesaws for children. However, this park is in a condition that is not maintained so that the quality of the park decreases from year to year. This condition results in a lack of public interest in activities and social interactions. Apart from that, the supporting facilities in the park are starting to become damaged and are often misused for negative activities. The main problem seen and studied based on literature studies and field studies is that Vatenamoya Park, even though it is located in the middle of the city, does not fulfill its function as a recreational facility. Even though the park is very strategically located, the park seems neglected, especially at night. This park has no lighting at all. This park also does not have an attractive design to invite visitors to activities in the park both afternoon and evening. The aim of this research is to redesign an attractive park so that people can do activities in the afternoon and evening. This research was carried out using data search methods in the form of interviews, observations, and library/literature studies, methods of analyzing quantitative and qualitative data, then methods of redesigning Vatenamoya City Park. This park redesign concept prioritizes the recreational function of the park so that it can attract the attention of the public, especially teenagers and children, to carry out activities in the park.

NORMAL CONCRETE COMPRESSIVE STRENGTH USES COARSE AGGREGATE (COAL STONE) KEEROM DISTRICT

evalina silaban — 2024-05-29

Concrete is one of the building construction materials that has been commonly used. The concrete constituent consists of cement, fine aggregate, coarse aggregate and water. The development in Keerom District, especially in Arso District, still uses sand from the times of Keerom Regency to be used as fine aggregate material in the manufacture of concrete. But the quality is not scientifically known, so it is necessary to do research on the feasibility of the quality of concrete from these materials. The purpose of this study was to determine the concrete compressive strength using the local agronomy of the Arso District of Keerom Regency. The method used for data analysis is a trial method. The results of testing the compressive strength of concrete showed that the local aggregate of Keerom Regency had compressive strength with an average value of three specimens of 19.76 MPa for 7 days, and 23.83 MPa for 14 days and 26.01 MPa for 28 days

EXPERIMENTAL TEST OF SAND ROUGHNESS AS A BASE LAYER OF CANALS

waode zulia prihatin — 2024-05-29

Flow in an open channel is flow that has a free surface. The free surface is a meeting of two fluids with different densities, namely air and water, where the density of air is much smaller than the density of water. Obstacles to flow in natural channels are important in overcoming engineering problems of hydraulics and sedimentation. The biggest difficulty in using the Manning Formula is determining the roughness coefficient n, because there is no specific way to select the n value. Many natural channels have permeable bottom layer materials such as gravel, sand and others. From the test results and data analysis, it was found that the channel base used sand with a slope of 0.25%, 0.50%, 0.75%, 1.00%. The roughness values for the sand base layer were 0.0115, 0.0124, 0.0123, and 0.0120, respectively.

STUDY OF STRENGTHENING GFRP SHEETS ON REINFORCED CONCRETE BEAMS DUE TO FLEXIBLE LOADS

adji putra abian — 2024-05-29

One method of strengthening structural elements such as beams that experience strength degradation due to fire or corrosive reinforcement is by using fiber reinforced concrete (FRP), in this case the glass fiber reinforced concrete (GFRP) type is used. This research will compare previous research where reinforced concrete beams with dimensions of 150 mm x 200 mm x 3300 mm using 3D13 mm tensile reinforcement and P8-80/200 mm (BE) shear reinforcement are compared with reinforced concrete beams using 3D10 mm tensile reinforcement and reinforcement. shear P8-100/175 mm (BK) and reinforced concrete beams with additional GFRP reinforcement (BNS). The quality of concrete used from the compressive strength test results for the existing BE beam is 21.82 MPa, while the BK and BNS control beams use a concrete quality of 23.48 MPa, which means the quality of the three beam variations is almost the same or close. The bending test results show that the BK beam has a lower ultimate capacity than the BE beam by 19.12%, while the BNS beam has a greater ultimate strength than the BE beam by 17.28%. This phenomenon shows that strengthening with GFRP is able to restore lost concrete capacity and is better than before.

ANALYSIS OF RISK MANAGEMENT IN THE CONSTRUCTION OF BUILDING "X"

nandan lima krisnan — 2024-05-29

Risk management has been studied and introduced in various literature, including the risk management process, risk identification, risk analysis, risk response, and risk monitoring. In building construction projects, risk assessment is carried out from both technical and non-technical perspectives. From a technical perspective, risks are assessed starting from the heavy equipment used, worker safety, materials and work quality, while from a non-technical perspective, risks are assessed as arising from environmental, socio-economic, legal and institutional and financial aspects. The aim of this research is to determine the potential risks that may arise during the implementation of the X Building construction project and to determine the ability to mitigate risks on the project and make decisions by providing accurate and relevant information regarding the risks faced using the Likert scale method. and distributing questionnaires with the results of collecting data on human resources, tool resources and questionnaires by analyzing data using risk identification, risk probability analysis and risk matrices.